diff --git a/dlls/geoip/msvc12/geoip.vcxproj.filters b/dlls/geoip/msvc12/geoip.vcxproj.filters
index 3d3251a0..01d95974 100644
--- a/dlls/geoip/msvc12/geoip.vcxproj.filters
+++ b/dlls/geoip/msvc12/geoip.vcxproj.filters
@@ -23,7 +23,7 @@
     </Filter>
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="..\GeoIP2\maxminddb.cpp">
+    <ClCompile Include="..\GeoIP2\maxminddb.c">
       <Filter>GeoIP2</Filter>
     </ClCompile>
     <ClCompile Include="..\geoip_util.cpp">
@@ -70,4 +70,4 @@
       <Filter>Pawn Includes</Filter>
     </None>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>